head to head · open source
ponytail vs evolver
ponytail has 182,779 GitHub stars, 10,094 forks, 270 open issues and last shipped 5 days ago. evolver has 8,715 stars, 847 forks, 26 open issues and last shipped 2 days ago. ponytail leads on adoption by 1,997% (182,779 vs 8,715 stars). ponytail is written in JavaScript under MIT; evolver is written in JavaScript under GPL-3.0. ponytail has attracted 6% as many forks as stars, evolver 10%. evolver was the more recently maintained of the two, and both are self-hostable with no licence fee.
Two open source projects, one decision. Both are free and self-hostable — the differences are community size, license terms, language stack and release pace.
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Side by side
| ponytail | evolver | |
|---|---|---|
| GitHub stars | ★ 183K | ★ 8.7K |
| License | MIT | GPL-3.0 |
| Written in | JavaScript | JavaScript |
| Last push | 2026-10-29 | 2026-11-01 |
| Forks | ⑂ 10K | ⑂ 847 |
| Self-hosting | Yes | Yes |
| Data ownership | Your server | Your server |
pick ponytail if
- You weight community size — 183K stars and counting
- You want the MIT license terms
- Your stack matches JavaScript
- You value the larger contributor base for long-term maintenance
pick evolver if
- You want the evolver feature set and don't need the biggest community
- You prefer the GPL-3.0 license terms
- Your stack matches JavaScript
- You evaluated both and evolver fits your workflow better
About ponytail
Ponytail He says nothing. He writes one line. It works. 54% less code (up to 94%) · 20% cheaper · 27% faster · 100% safe Measured on real Claude Code sessions editing a real open source repo (FastAPI + React), against the same agent with no skill. 54% is the mean across 12 feature tasks (Haiku 4.5, n=4); it reaches 94% where an agent over builds (a date picker) and is near zero where the code is already minimal. ponytail keeps every safety guard while a bare "write one liners" prompt drops one. (The earlier single shot benchmark reported 80 94% as a flat figure; against a fair agentic…
read the full ponytail overview →
About evolver
Evolver — Agent Self Evolving Engine evomap.ai Documentation Chinese / 中文文档 Japanese / 日本語ドキュメント Korean / 한국어 문서 GitHub Releases Notice — Moving Toward Source Available Evolver has been fully open source since our first release on 2026 02 01 (initially MIT, and GPL 3.0 or later since 2026 04 09). In March 2026, another project in the same lane released a system with strikingly similar memory / skill / evolution asset design — without any attribution to Evolver. Full analysis: Hermes Agent Self Evolution vs. Evolver: A Detailed Similarity Analysis. To protect the integrity of the work and keep investing in this…
read the full evolver overview →
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Frequently asked questions
Is ponytail or evolver more popular?
ponytail has 182,779 GitHub stars and evolver has 8,715. ponytail has the larger community by that measure.
Are ponytail and evolver free?
Both are open source. ponytail is licensed under MIT and evolver under GPL-3.0. Neither carries a licence fee.
What is the difference between ponytail and evolver?
ponytail is written in JavaScript and evolver in JavaScript. The practical differences are community size, licence terms, language stack and release cadence — all compared in the table above.
Which should I choose, ponytail or evolver?
Choose ponytail if you want the larger community (182,779 stars) or its MIT licence terms. Choose evolver if its feature set, stack or GPL-3.0 licence fits better. Both are self-hostable.